Acquisition method (AMC)
3
FSC 4820 × VALVE,SAFETY RELIEF
VALVE,SAFETY RELIEF
4820-01-621-6774 FSC 4820
NSN 4820-01-621-6774 (also written 4820016216774; NIIN 01-621-6774) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 4 manufacturer part numbers from 4 suppliers are on record. It was last purchased in Sep 2026.
Open for bid
No open solicitations on record for this NSN right now.
Can you win it?
This item is coded to be bought directly from the actual manufacturer (AMC 3).
Suffix (AMSC)
D
Competition
Coded for a named source
AMC 3: buy directly from the actual manufacturer, second or later time. AMSC D: the data needed to compete the part is unavailable or cannot be obtained economically. The codes describe the item's status on record, not any one solicitation. What the codes mean
What it is — can you make it?
Dimensions, the FLIS specification requirements, and the manufacturer part numbers already qualified against this NSN.
Specifications
From the federal catalog (DLA FLIS / PUB LOG) — what your part has to meet. Cited specification documents can be looked up in ASSIST Quick Search ↗, DoD's public spec repository — copy the document number in.
| Requirement | Value |
|---|---|
| MATERIAL MATT | BODY STEEL CORROSION RESISTING |
| STYLE DESIGNATOR STYL | — |
| MAXIMUM OPERATING TEMP AEHZ | SINGLE RESPONSE FAHRENHEIT 375.0 |
| CONNECTION STYLE AHNC | — |
| NOMINAL WIDTH AKGF | ALL ENDS INCHES 0.875 |
| SPECIAL FEATURES FEAT | FORMER NAME: NRP,CHECK VALVE(BYP |
| PART NAME ASSIGNED BY CONTROLLING AGENCY CXCY | CHECK VALVE (BYPASS) |
| DISK LOADING METHOD ADSU | SPRING |
| OPERATING PRESSURE CQQF | SECOND RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 3000.0 |
| BONNET ATTACHMENT METHOD ADST | INTEGRAL |
| OPERATING PRESSURE CQQF | FIRST RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 2185.0 |
| THREAD SERIES DESIGNATOR THSD | ALL ENDS NPT |
| FLOW CONTROL DEVICE ADQU | POPPET |
| BONNET TYPE ADSR | INSIDE SPRING |
| ADJUSTABLE PRESSURE RANGE CQCY | POUNDS PER SQUARE INCH 3.0 TO 50.0 |
| NOMINAL THREAD SIZE CQJX | ALL ENDS INCHES 0.500 |
| SUPPLEMENTARY FEATURES SUPP | SET AT 40 PSI +/- 2 PSI; O-RINGS: FLUOROCARBON FKM |
| THREAD DIRECTION AAJF | ALL ENDS RIGHT-HAND |
| CONNECTION TYPE AWLS | ALL ENDS THREADED EXTERNAL PIPE |
| NOMINAL LENGTH AKGG | ALL ENDS INCHES 2.56 |
| VALVE OPERATION METHOD AQLR | AUTOMATIC |
Manufacturer part numbers
Commercial part numbers cross-referenced to this NSN in the federal catalog — the parts that have been accepted as satisfying this stock number, and who makes them.
| Part number | CAGE | Manufacturer |
|---|---|---|
| 1913732 | D1253 | TKMS GMBH |
| 3890AS000637-01 | 30003 | NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER |
| 3890AS000637-01 | 4XB60 | GENERAL ATOMICS DIV GENERAL ATOMICS ELECTROMAGNETIC SYSTEMS |
| SS-8CPA2-3 | 3T9T9 | SWAGELOK CO |
What it pays — so you can quote
The government's own price and demand record for this NSN — what past awards cleared at, so you know where to land your quote.
Latest unit price
—
Purchases
0
Total spend
—
Sep 16, 2026
Last purchased
1 · 1.0/yr
Purchase records
$7,376
Total demand
$7,376
Latest award total
Purchase history
No priced purchases on record for this NSN yet.
Related contract actions
Contract action totals, not unit prices — obligation amounts from USAspending for related awards, shown for context only. These do not appear on the price chart above.
| Action date | Award # | Recipient | Agency | Obligation |
|---|---|---|---|---|
| Sep 16, 2026 | SPE7MC26P3140 ↗ | GENERAL ATOMICS DBA GENERAL ATOMICS CORP | — | $7,376 |
Demand history
Who wins this item
Does one supplier win this every time, and are the winners on the listed-source list? One dot per award.
- Award in the last 2 years
- Older award
GENERAL ATOMICS DBA GENERAL ATOMICS CORP
last award Sep 2026
GENERAL ATOMICS DIV GENERAL ATOMICS ELECTROMAGNETIC SYSTEMS
no award yet
no awards on record
Listed source NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER
no award yet
no awards on record
Listed source SWAGELOK CO
no award yet
no awards on record
Listed source TKMS GMBH
no award yet
no awards on record
Listed source GENERAL ATOMICS DBA GENERAL ATOMICS CORP won the only award on record. GENERAL ATOMICS DBA GENERAL ATOMICS CORP won without being a listed source.
Open RFQs on DIBBS → DIBBS award history ↗
About this data
- Unit prices: DLA DIBBS award records — every row links to its government record.
- AMSC: latest observed value from DIBBS solicitation history as of Oct 20, 2026.
- Contract action totals: USAspending, context only.
- Data last refreshed: 2026-10-20.
- Full methodology →
Cite this page
Citation
NSN Explorer. "VALVE,SAFETY RELIEF." nsnexplorer.com, https://nsnexplorer.com/nsn/4820-01-621-6774/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/4820-01-621-6774/